CODEWITHSUNDEEP
pythonlist
Mahesh Kumar K
Mahesh Kumar K

Reputation: 1

How to convert strings in a list to individual lists?

Consider, I have a list 

subjects = ['subject1', 'subject2', 'subject3', 'subject4', 'subject5']

How do I convert these individual list elements to individual lists?

subject1 = [ ]
subject2 = [ ]
subject3 = [ ]
subject4 = [ ]
subject5 = [ ]

Upvotes: 0

Views: 74

Answers (3)

liushuaikobe
liushuaikobe

Reputation: 2190

subjects = ['subject1', 'subject2', 'subject3', 'subject4', 'subject5']
ret = {}.fromkeys(subjects, [])

Then ret is 

{'subject1': [], 'subject2': [], 'subject3': [], 'subject4': [], 'subject5': []}

-- EDIT --

As @Anand said, all the values are the same list reference. To avoid this, there's a workaround:

ret = {k: [] for k in subjects}

Upvotes: 4

rolika
rolika

Reputation: 391

If you really want induvidual lists, and not a dictionary:

for subject in subjects:
    exec(subject + " = list()")

Upvotes: 0

FunkySayu
FunkySayu

Reputation: 8101

If you use dictionnary, you can do the following :

dictionnary = dict((s, []) for s in subjects)

You can access your list by doing the following :

my_list = dictionnary['subject1']
my_list.append(5)
print(dictionnary['subject1'] == [5]) # True

# Or also
dictionnary['subject1'].append(5)

Upvotes: 0

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